Grinding or polishing roll.



PATENTED JAN. 3, 1905.

C. B. WATTLES.

I GRINDING OB. POLISHING ROLL.

APPLICATION FILED FEB. 15, 1904.

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85% W v I NO. 779,386. PATENTED JAN. 3, 1905. Y

0. B. WATTLES.

' GRINDING 0R POLISHING ROLL.

APPLIOATION FILED FEB. 15, 1904.

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UNITED STATES Patented January 3, 1905.

PATENT OFFICE.

CYRA B. WVATTLES, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE SURFACINGMACHINE COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODEISLAND.

GRINDING OR POLISHING ROLL- SPECIFICATION forming part of Letters PatentNo. 779,386,'dated January 3, 1905.

Application filed February 15, 1904:- Serial No- 193,488.

To (LZZ whom it may concern.-

Be it known that I, CYRA B. /VA'rTLEs, a resident of the city ofProvidence, in the county of Providence and State of Rhode Island, have5 invented certain new and useful Improvements in Grinding or PolishingRolls; and I do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, and

I to the figures of reference marked thereon,

which form a part of'this specification.

This invention has reference to improvements in a rotary disk orcylinder which has secured to its surface a skin or outer covering I offelt, sandpaper, emery paper or cloth, corundum, or other similarabrasive material for use in grinding or polishing.

The primary object of this invention is to so construct the internalmechanism of this roll or disk that the outer grinding or polishingsurface or skin-such as felt, sandpaper, or the likemay be readilyattached to and detached from said roll, the internal mechanism beingalso arranged to automatically take 5 up the slack of said outercovering as it becomes stretched while on the rapidlyrevolving cylinderby coming in contact with the work, thereby keeping a constant tensionon the same until released for the purpose of re- 3 plenishing.

The particular construction herein shown and described is especiallydesigned and adapted for use on a machine for dressing or polishingwooden floors; but the same device may be employed in grinding, bufiing,or polishing rolls for jewelers use or for any other purpose for which aroll of this character may be adapted.

In using the roll on the floor-dressing maare used, for reasonshereinafter more fully described.

The invention consists of other novel fea- 5 tures and parts andcombinations of the same, as will be fully described hereinafter andthen pointed out in the appended claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a central sectional elevation showing the interior of theroll and the two separate tightening devices with the drivingpulley onthe end of the shaft. Fig. 2 is an end view on line 2 2 of Fig. 1,showing a portion of the handle and lock-pawl by which the tension onthe outer covering or skin is re- 5 leased and the holding-jaws openedto release the end of said covering. Fig. 3 is a sectional end viewshowing the jaws opened and the outer skin orcovering released. This isdone by inserting the handle and bringing the in- 7c ternal mechanism upto the central point, which position corresponds with that shown in Fig.2. Fig. 4 is a sectional view on line 4: 4c of Fig. 1, showing the skinor outer covering in place and being held under tension, one end beingsecured in the bite of the jaws, the opposite end being bent back on theinside of the cylinder and held in place by the friction of the firstend upon it. Fig. 5 is a detail view in perspective of the biting-jaw,

showing the teeth on the upper edge of the same. Fig; 6 is a detail viewin perspective, showing the spring-actuated block, the upper portion ofwhich forms a jaw against which the toothed jaw bites. Fig. 7 is a sideeleva- 5 tion showing a flanged sleeve, the flange of which forms one ofthe heads in the cylinder. Fig. 8 shows the handle and latch or pawl bywhich the tension mechanism is brought to its central position and heldand the jaws opened 9 to release the abrasive skin or covering. Thelocking-pawl shown drops into the notch, as shown in Fig. 2, to holdsaid spring-actuated mechanism in the desired position while the outercovering is being replenished. Fig. 9 represents a portion of thecylinder in elevation, showing the slots in the same.

Referring to the drawings, at 1 is the shell, which is made in a tubularform and of any suitable material. When it is desired to use a longroll, 1 preferably out two slots 2 and 3 through the periphery of thisshell, which slots may be set staggering, or they may be made, as shownin the drawings, one on the opposite side of the cylinder to the other.This arrangement is made so as to avoid cutting one long slot the entirelength of the cylinder, thereby weakening the shell too much forpractical use. Then, again, by dividing up this opening the roll runsmuch smoother and without jar or vibration, as the other half of theroll, where the slot does not extend, has a continuous surface whichkeeps the roll from jumping, and much more satisfactory results arethereby attained. As I find it advisable to use two slots, I thereforefor similar reasons find it advisable to use two pieces of sandpaper orthe like and aduplicate set of mechanism at each end of the roll as aseparate tension or take-up for holding and tightening each sheet ofpolishing or grinding material.

At 1 is the flange on the end of the sleeve or trunnion 5, the peripheryof which flange is turned the size of the inside diameter of the shelland when in place forms a head for the same. The length of the sleeve 5is onehalf the length of the cylinder 1 and meets a corresponding sleevein the center of said cylinder at 6 as it projects in from the oppositeend of the same.

At 7 (see Fig. 6) is a double-winged block out out at its center portionand having bearings at each end 8 and 9, by which bearings it is looselymounted on the trunnion 5. The upper portion 10 of this block serves asone of the jaws by which the end 11 of the sandpaper or the like isheld. At 12 is the toothed jaw-piece, also loosely mounted on thetrunnion 5 by the bearings 1 1 14. On the upper edge of this jaw are setthe teeth 13, (see Fig. 5,) which when closed puncture the end 11 of thesandpaper or the like, said teeth extending through the same and intocorresponding holes 15 in the opposite jaw 10, made to receive them.These jaws are held together by the tension of the spring 16, which ismounted on the pin 17. This pin extends through the lower portions 18 ofthe block and also the downwardly-projecting portion 19 of the toothedjaw. At 20 is a washer which holds said spring in place, said washerbeing held onto the end of said pin by the cotter-pin 21. At 22 is afixed stop piece or lug against which the downward]y-projecting end 19of the toothed jaw rests when the mechanism is swung up to its centralposition, as shown in Fig. 3, for the purpose of opening said jaws. At23 is the flat coil-spring, which has a number of turns around thesleeve 5, one end being secured at 24 to said sleeve, while the oppositeend 26 engages and presses against the upper portion 10 of the rotatableblock. At

27 is an end piece which is mounted on and fixed to the hub 8 of theblock. This piece 27 might be made integral with this block, but forstructural reasons is made separate and secured to the end of the hub.Into this piece is made the hole or recess 28 for the reception of theend 29 of releasing-handle 30. Around this shell is wrapped a layer offelt 31 or other cushioning substance, and around the cushioningsubstance is wrapped a layer of the polishing or abrasive faced material32. This layer, as above described, is made in two parts, each part orpiece covering one-half of the length of the roll.

The whole mechanism is mounted on a center shaft 36, to which thesleeves 5 5 are fixed. This shaft may be supported in any suitablemanner. I have, however, shown the same supported at each end of thecylinder on hearing 37 37 and the whole as being driven through pulley38 on the end.

In assembling the parts I find it of considerable advantage to be ableto remove the head and sleeve, on which latter I mount the tensionmechanism complete and replace the whole in the shell intact and securethe head in position.

The construction and mechanism at one end of the roll is an exactduplication of the opposite end.

For many purposes the rolls are used onehalf of the length of thatshown, and only one set of tension mechanism is required.

To secure the skin or covering to the roll, the first operation is toinsert the end 29 of the handle through the slot into the hole 28 anddraw the tension mechanism above described up to the central position.(Shown in Figs. 2 and 3.) The end of the latch or pawl 35 will by itsown gravity then drop into the said slot 34: and by bringing up againstthe end of the slot hold the said mechanism in position with the jawsopen, as shown in Fig. 3. in carrying this mechanism up to its centralposition the lower end 19 of the toothed jaw 12 brings up against thestop-piece 22, while the opposite jaw 10 continues on, causing the twoto draw apart or open. One end, 33, of the outer abrasive or polishingcovering is then passed through the slot and bent back underneath on theinside of the shell, (see Figs. 2 and 3,) the opposite end, 11, beingcarried around the roll and passed down through the same slot betweenthe open jaws 10 and 12, which stand ready to receive it. The handle 30is then withdrawn from the hole 28, and, acting under the tension of thespring 23, the block commences to rotate, causing the jaw 10 to close onthe toothed jaw 12, the teeth of which latter jaw, beingunder tension ofspring 16, puncture the end 11 of the covering, firmly biting the sameand holding it securely in its grasp. When these jaws move forward withthis end tightly held, the rough surface of the skin as it is drawnthrough the slot comes in contact with the corresponding surface of thelife and efficiency of the outer covering are materially increased.

Having thus described my invention, what I claim and new, and desire tosecure by Letters Patent, is

1. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jaw withinsaid cylinder, a second jaw arranged to bite the end of said coveringand move with the first jaw to take up the slack or stretch of the sameautomatically, and means for opening the jaws automatically when thetension is removed from the covering.

2. In a-grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jaw withinsaid cylinder, a second jaw arranged to bite the end of said covering byspring-pressure and move with the first jaw to take up the slack orstretch of the same automatically and means for closing the jawautomatically when the tension is applied.

3. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jaw withinsaid cylinder, a second spring-actuated jaw arranged to bite the end ofsaid covering by spring-pressure and move with the first jaw to take upthe slack or stretch of the same automatically, and means for openingthe jaws automatically when the tension is released from the covering.

4. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jawpivotally hung within said cylinder, a second jaw also pivotally hung,means for causing these jaws to bite the end of said covering and takeup the slack or stretch of the same automatically.

5. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jawpivotally hung within said cylinder, a second jaw also pivotally hungwithin said cylinder, spring-actuated means for causing these jaws tobite the end of said covering and take uplilahe slack 0r stretch of thesame automat- 1ca y.

6. In a grinding or polishing roll, a cylinder around which is wrappedor wound a cov ering of material, a rotatable spring-actuated jawpivotally hung within said cylinder, a second jaw also pivotally hungwithin said cylinder, spring-actuated means for causing these jaws tobite the end of said covering and take up the slack or stretch of thesame automatically, and means for opening the jaws automatically whenthe tension is removed from the covering. C

7. In a device of the character described, a cylinder around which iswrapped or wound a covering of material for grinding or polishing, aspring-actuated jaw, a second springactuated jaw. arranged to rotate andcarry the first jaw, both of which jaws are arranged to retain and drawone end of the covering tightly around the cylinder and means forholding the other end of said covering.

8. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jaw withinsaid cylinder, a second jaw arranged to bite the end of said covering byspringpressure and move with the first jaw to take up the slack orstretch of the same automatically and means by which both ends of saidcovering are released when the tension is removed from said covering.

9. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jawpivotally hung within said cylinder, 2. second jaw also pivotally hungwithin said cylinder, spring-actuated means for causing these jaws tobite one end of said covering and take up the slack or stretch of thesame automatically, and means for holding the other end of saidcovering.

10. In a grinding or polishing roll, a cylinder around which is wrappedor wound a covering of material, a rotatable spring-actuated jawpivotally hung within said cylinder, a second jaw also pivotally hungwithin said cylinder, spring-actuated means for causing these jaws tobite one end of said covering and take up the slack or stretch of thesame automatically, the other end of said covering being bent back onthe inside of the cylinder and held in place by pressure from therotating tension-jaws.

11. In a grinding or polishing roll, a cylinder around which is wrappeda covering of material, a rotatable spring-actuated jaw pivotally hungwithin said cylinder, a spring acting to rotate said jaw,said springbeing mounted at the pivoting-point of the jaw, a second jaw alsopivotally hung within said cylinder, spring-actuated means for causingthese jaws to bite one end of said covering, and means for holding theother end of said covering.

12. In a grinding or polishing roll, a cylinder around which is wrappeda covering of material, a rotatable spring-actuated jaw pivotally hungwithin said cylinder, a spring acting to rotate said jaw,said springbeingmounted at the pivoting-point of the jaw, a second jaw alsopivotally hung within said cylinder, and having a portion extendingbeyond the pivoting-point on the opposite side from the jaw, a springacting on this extension to close said jaws, and bite one end of saidcovering in order that it may be stretched around the cylinder, andmeans for holding the other end of said covering.

13. In a device of the character described, a cylinder around which iswrapped a plurality of strips or sheets of material laid side by side tocover its working face, individual slots through said cylinder in whichthe ends of each sheet are secured, each slot being made through theperiphery at different points in the circumference and out of line witheach other to break the joint, and means by which the slack or stretchof said material may be taken up automatically.

1a. In a device of the character described, a cylinder around which iswrapped a plurality of strips or sheets of material each sheet coveringbut a portion of its working face, a slot in the periphery of saidcylinder for each sheet of material used, each of said slots extendingbut a portion of the length of the cylinder, and means for securing theends of the material in said slots.

15. In a device of the character described, a cylinder around which iswrapped a plurality of strips or sheets of material, each sheet coveringbut a portion of its working face, a slot in the periphery of saidcylinder for each sheet of material used, each of said slots extendingbut a portion of the length of the cylinder, and means by which theslack or stretch of the material may be taken up automatically.

16. In a device of the character described, a cylinder around which iswrapped a plurality of strips or sheets of material laid side by side tocover its working face, individual slots through said cylinder in whichthe ends of each sheet are secured, each slot being made through theperiphery at different points in the circumference and out of line witheach other to break the joint, two rotatable springactuated jaws eachone being pivotally hung within said cylinder, and means for causingthese jaws to bite the end of said covering and take up the slack orstretch of the same automatically.

17. In a device of the character described, a cylinder around which iswrapped a plurality of strips or sheets of material laid side by side tocover its working face, individual slots through said cylinder in whichthe ends of each sheet are secured, each slot being made through theperiphery at different points in the circumference and out of line witheach other to break thejoint, two rotatable springactuated jaws each onebeing pivotally hung within said cylinder, means for causing these jawsto bite the end of said covering and take up the slack or stretch of thesame automatically, and means for opening these jaws automatically whenthe tension is released on the covering.

18. In a grinding or polishing roll, a cylinder around which is wrappeda covering of material, a head in each end of said cylinder, aninwardly-projectingtrunnion on each head, two rotatable spring-actuatedjaws pivotally mounted on each of said trunnions for engaging andtightening the material around said cylinder, two slots through theperiphery of said cylinder, each slot extending but onehalf the lengthof the working face of said cylinder and out of. line with each otherfor the purpose of breaking the joint, each slot communicating with itsindividual set of jaws.

19. In a device of the character described, a cylinder around which iswrapped a plurality of strips or sheets of material laid side by side tocover its working face, individual slots through said cylinder in whichthe ends of each sheet are passed, each slot being made through theperiphery at different points in the circumference and out of line witheach other to break the joint, a head in each end of said cylinder, aninwardly-projecting trunnion on each head, two rotatable spring-actuatedjaws pivotally mounted on each of said trunnions for engaging andtightening the material which is wrapped around said cylinder.

In testimony whereof I have hereunto set my hand this 13th day ofFebruary, A. D. 1904:.

GYRA B. VVATTLES.

In presence of- HOWARD E. BARLOW, E. I. OGDEN.

